cloudir: 改正启动失败问题

```sh
find pkg -name 'models' | while read d; do
	for f in $d/*.go; do
		case "$f" in
			*/doc.go) ;;
			*/initdb.go) ;;
			pkg/lbagent/models/*) ;;
			*)
				if grep -q 'Manager = ' $f; then
					grep -q 'SetVirtualObject' $f || echo $f
				fi
				;;
		esac
	done
done
```

pkg/cloudcommon/etcd/models/serviceregistries.go

@@ -52,6 +52,7 @@ func init() {
 			"service-registries",
 		),
 	}
+	ServiceRegistryManager.SetVirtualObject(ServiceRegistryManager)
 }
 
 func (manager *SServiceRegistryManager) Register(ctx context.Context, addr string, port int,